Through a questionnaire survey and interviews if nearly 500 ethnic Chinese living in Thailand on the issues of language usage，language ability，and ethnic identity，the authors of this study have found that the Chinese youth in Thailand have shown the characteristics of diversity. On the issue of national identity，they are fully in favor of their living country；On the issue of cultural identity，compared with their ancestors，the new generation tend to hold a rational attitude while their ancestors take an emotional attitude to the Chinese culture.